caa a22 4500 44537179X CHVBK 20180317142949.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s00340-010-4222-4 doi (NATIONALLICENCE)springer-10.1007/s00340-010-4222-4 Tuning fork enhanced interferometric photoacoustic spectroscopy: anew method for trace gas analysis [Elektronische Daten] [M. Köhring, A. Pohlkötter, U. Willer, M. Angelmahr, W. Schade] A photoacoustic trace gas sensor based on an optical read-out method of a quartz tuning fork is shown. Instead of conventional piezoelectric signal read-out, as applied in well-known quartz-enhanced photoacoustic spectroscopy (QEPAS), an interferometric read-out method for measurement of the tuning fork's oscillation is presented. To demonstrate the potential of the optical read-out of tuning forks in photoacoustics, a comparison between the performances of a sensor with interferometric read-out and conventional QEPAS with piezoelectric read-out is reported. The two sensors show similar characteristics. The detection limit (L) for the optical read-out is determined to be L opt=(2598±84)ppm (1σ) compared to L elec=(2579±78)ppm (1σ) for piezoelectric read-out. In both cases the detection limit is defined by the thermal noise of the tuning fork. Springer-Verlag, 2010 Köhring M. Fraunhofer Heinrich Hertz Institute, Am Stollen 19, 38640, Goslar, Germany aut Pohlkötter A. MIOPAS GmbH, Am Stollen 19, 38640, Goslar, Germany aut Willer U. Institute for Energy Research and Physical Technology, Clausthal University of Technology, Am Stollen 19, 38640, Goslar, Germany aut Angelmahr M. Fraunhofer Heinrich Hertz Institute, Am Stollen 19, 38640, Goslar, Germany aut Schade W. Fraunhofer Heinrich Hertz Institute, Am Stollen 19, 38640, Goslar, Germany aut Applied Physics B Springer-Verlag 102/1(2011-01-01), 133-139 0946-2171 102:1<133 2011 102 340 https://doi.org/10.1007/s00340-010-4222-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-4222-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Köhring M. Fraunhofer Heinrich Hertz Institute, Am Stollen 19, 38640, Goslar, Germany aut NATIONALLICENCE 700 1- Pohlkötter A. MIOPAS GmbH, Am Stollen 19, 38640, Goslar, Germany aut NATIONALLICENCE 700 1- Willer U. Institute for Energy Research and Physical Technology, Clausthal University of Technology, Am Stollen 19, 38640, Goslar, Germany aut NATIONALLICENCE 700 1- Angelmahr M. Fraunhofer Heinrich Hertz Institute, Am Stollen 19, 38640, Goslar, Germany aut NATIONALLICENCE 700 1- Schade W. Fraunhofer Heinrich Hertz Institute, Am Stollen 19, 38640, Goslar, Germany aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 102/1(2011-01-01), 133-139 0946-2171 102:1<133 2011 102 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer